參數(shù)資料
型號： R5F562N8ADFB#V0
廠商： Renesas Electronics America
文件頁數(shù)： 66/148頁
文件大小： 0K
描述： MCU 32BIT FLASH 512KROM 144LQFP
產(chǎn)品培訓(xùn)模塊： RX Compare Match Timer
RX DMAC
標(biāo)準(zhǔn)包裝： 1
系列： RX600
核心處理器： RX
芯體尺寸： 32-位
速度： 100MHz
連通性： EBI/EMI，I²C，SCI，SPI，USB
外圍設(shè)備： DMA，LVD，POR，PWM，WDT
輸入/輸出數(shù)： 103
程序存儲器容量： 512KB（512K x 8）
程序存儲器類型： 閃存
RAM 容量： 96K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10/12b，D/A 2x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 144-LQFP
包裝： 托盤
PIC18F6520/8520/6620/8620/6720/8720
DS39609B-page 22
2004 Microchip Technology Inc.
TABLE 2-2:
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
An external clock source may also be connected to the
OSC1 pin in the HS, XT and LP modes, as shown in
FIGURE 2-2:
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR
LPOSC CONFIGURATION)
2.3
RC Oscillator
For timing insensitive applications, the “RC” and
“RCIO” device options offer additional cost savings.
The RC oscillator frequency is a function of the supply
voltage, the resistor (REXT) and capacitor (CEXT) val-
ues and the operating temperature. In addition to this,
the oscillator frequency will vary from unit to unit, due
to normal process parameter variation. Furthermore,
the difference in lead frame capacitance between pack-
age types will also affect the oscillation frequency,
especially for low CEXT values. The user also needs to
take into account variation due to tolerance of external
R and C components used. Figure 2-3 shows how the
R/C combination is connected.
In the RC Oscillator mode, the oscillator frequency
divided by 4 is available on the OSC2 pin. This signal
may be used for test purposes or to synchronize other
logic.
FIGURE 2-3:
RC OSCILLATOR MODE
The RCIO Oscillator mode functions like the RC mode,
except that the OSC2 pin becomes an additional
general purpose I/O pin. The I/O pin becomes bit 6 of
PORTA (RA6).
Ranges Tested:
Mode
Freq
C1
C2
LP
32 kHz
15-22 pF
200 kHz
XT
1 MHz
15-22 pF
4 MHz
HS
4 MHz
15-22 pF
8 MHz
20 MHz
Capacitor values are for design guidance only.
These capacitors were tested with the above crystal
frequencies for basic start-up and operation. These
values are not optimized.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
VDD and temperature range for the application.
See the notes following this table for additional
information.
Note 1: Higher capacitance increases the stability
of the oscillator, but also increases the
start-up time.
2: When operating below 3V VDD, or when
using certain ceramic resonators at any
voltage, it may be necessary to use the
HS mode or switch to a crystal oscillator.
3: Since each resonator/crystal has its
own characteristics,
the
user
should
consult the resonator/crystal manufac-
turer for appropriate values of external
components,
or
verify
oscillator
performance.
4: RS may be required to avoid overdriving
crystals with low drive level specification.
5: Always verify oscillator performance over
the VDD and temperature range that is
expected for the application.
OSC1
OSC2
Open
Clock from
Ext. System
PIC18FXX20
OSC2/CLKO
CEXT
REXT
PIC18FXX20
OSC1
FOSC/4
Internal
Clock
VDD
VSS
Recommended values:
3 k
≤ REXT ≤ 100 k
CEXT > 20 pF
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